1 Chronicles 9:26-27

These Levites were in their set office These were constantly upon the place, in the execution of their office, that they might oversee the inferior porters in their work. Were over the treasuries In which the sacred utensils, and other treasures belonging to the temple, were kept. They lodged round about the house of God They were not permitted to dwell in the villages as their brethren were, but were obliged to constant residence in the place, because their office required it.